Search found 28 matches

by subterfug3x
Fri Jan 10, 2020 7:16 am
Forum: Users
Topic: Dancoff Factor and resonance self-shielding calculations
Replies: 0
Views: 15

Dancoff Factor and resonance self-shielding calculations

Hello, How one can calculate dancoff factor with Serpent code? How to determine influence of resonance self-shielding effect on kinf/four-factor-formula coefficients for example in homogeneous and heterogeneous systems of the same parameters (material, size etc.). For example: reactor cell of prisma...
by subterfug3x
Mon Nov 25, 2019 2:52 pm
Forum: Input
Topic: Detector time binning
Replies: 8
Views: 3317

Re: Detector time binning

Could you post the full input, please. Full Input: % ----------------------------------------------------------------------------- set title "HGTRU Reactor Core with TNS" % ----------------------------------------------------------------------------- % Geometry: % ----------------------------------...
by subterfug3x
Sat Nov 23, 2019 6:15 pm
Forum: Input
Topic: Detector time binning
Replies: 8
Views: 3317

Re: Detector time binning

I assume you are simulating a sub-critical system? Unless you define time dependence for the source, all your source neutrons are born at t=0s. The result is that the neutron histories die out very fast, in the order of milliseconds in thermal systems and even faster in fast systems. So there are s...
by subterfug3x
Wed Nov 20, 2019 6:09 am
Forum: Bugs, problems, questions & feeback
Topic: tcut for slow simulations with a lot of scattering
Replies: 5
Views: 14706

Re: tcut for slow simulations with a lot of scattering

3. The external source simulation mode does not include delayed neutron emission by default, so you'll have to switch it on manually (set delnu 1). 4. In time-dependent / external source simulations one should be careful when talking about k-effective, which is a parameter existing only in the k-ei...
by subterfug3x
Tue Nov 05, 2019 11:30 am
Forum: Users
Topic: Fixed Source Fuel Depletion calculation
Replies: 10
Views: 670

Re: Fixed Source Fuel Depletion calculation

I'm doubt about my understanding of Serpent calculation process, Dear Dr. Leppänen, could you help me? 1). keff value of the system in fixed source mode and eigenvalue mode has a significant difference. For example, with use of burnable poison in fuel kern I made the system subcritical keff~0.95 in ...
by subterfug3x
Mon Oct 21, 2019 6:07 pm
Forum: Input
Topic: MCNP’s trc surface
Replies: 2
Views: 430

Re: MCNP’s trc surface

Faced the same problem. It's not fully clear how to write TRC surface in usersurf.c file. Could you please write the code for TRC surface here?
by subterfug3x
Thu Oct 17, 2019 7:17 pm
Forum: Users
Topic: More than 10,000,000 bins for a detector
Replies: 20
Views: 645

Re: More than 10,000,000 bins for a detector

Jaakko Leppänen wrote:
Thu Oct 17, 2019 6:12 pm
For some reason I don't get this error with the pow option. Which version are you using?
I'm using 2.1.31 with the hybrid OMP+MPI mode.
by subterfug3x
Thu Oct 17, 2019 12:05 pm
Forum: Users
Topic: Core power / fissrate distribution visualization in Matlab
Replies: 0
Views: 76

Core power / fissrate distribution visualization in Matlab

Hello, I'm trying to visualize the hexagonal core power/fissrate distribution on the fuel assembly level. I've found a simple solution on Serpent Wiki - Tutorial, so that example is suitable for rectangular lattices and assemblies. Could somebody share the Matlab script (or anything else) to visuali...
by subterfug3x
Tue Oct 15, 2019 12:15 pm
Forum: Users
Topic: Defining variables in the Serpent input file
Replies: 4
Views: 161

Re: Defining variables in the Serpent input file

Romain wrote:
Tue Oct 15, 2019 11:13 am
viewtopic.php?f=9&t=2991
Hello, Do you have the patch or the lines that should be added to source code?
by subterfug3x
Tue Oct 15, 2019 4:30 am
Forum: Users
Topic: More than 10,000,000 bins for a detector
Replies: 20
Views: 645

Re: More than 10,000,000 bins for a detector

Have you thought about using the pbed geometry type? There is an option to automatically obtain the power in each pebble: http://serpent.vtt.fi/mediawiki/index.php/Input_syntax_manual#pbed_.28explicit_stochastic_.28pebble_bed.29_geometry.29 I got the error when I tried to use "pow" option with pbed...